#include <stdio.h>
#include <stdlib.h>
int main()
{
    int number, i, j, k, l;
    printf("Please enter a number=");
    scanf("%d", &number);
    for (i = 1; i < number / 2; i++)
        for (j = 0; j <= i; j++)
            for (k = 0; k <= j; k++)
                for (l = 0; l <= k; l++)
                    if (number == i * i + j * j + k * k + l * l)
                    {
                        printf("%d=%d*%d+%d*%d+%d*%d+%d*%d\n",
                               number, i, i, j, j, k, k, l, l);
                        exit(0);
                    }
    return 0;
}
//熊贤豪